Stantec was retained by MDWASD to provide Design Services related to Consent Decree Projects at all three Wastewater Treatment Plants (Central, South and North District). METCO, as one of the subconsultants, is responsible for developing Design Report and Detailed Design Documents related to Electrical, I&C and HVAC system improvements in various process areas at these Wastewater Treatment Plants.
As part of the Master Contract for the Program, METCO was tasked to develop Preliminary Design Task Memorandum, Detailed Design Documents and Construction Assistance Services for major Electrical, and I&C improvements associated with Effluent Pump Station Upgrade at Central District WWTP of WASD.
METCO was responsible to provide the above services for the following key project elements:
- Design the new Electrical Room to house all major power and control equipment
- Replace and upgrade existing Medium Voltage - (5kV) Power Supply Equipment, for Effluent Pumps 1 through 6, including substation transformers and associated switchgear.
- Replace and upgrade existing MV (5kV) motors starting equipment for Effluent Pumps 1 through 6, consisting of Medium Voltage VFDs with bypass contactors and all associated control and monitoring equipment
- Replace six (6) 700 HP- MV Pump Motors with VFD-ready type motors
- Replace and upgrade the Low Voltage (480V) switchgear/MCCs, control and monitoring equipment related to Effluent Pumps.
The insufficient and inaccurate information on the existing primary cable duct bank routing and WASD requirements of minimum level of power outage to Pump Station were some of the challenges METCO was required to incorporate in the design documents.